As I remember, the Media Center uses a toggle code, so a learned signal will work every other time, then the code toggles. I memory serves, you can use regedit on windows and set all "debounce" registry entries to "0" -- this will disable the toggle. Still, I'm not getting any younger, and memory fades. Do a search, there are plenty of references on this in the Pronto NG forum, as well as this one. Hope that helps.